Stop Form Refreshing Page on Submit

Stop form refreshing page on submit

You can prevent the form from submitting with

$("#prospects_form").submit(function(e) {
    e.preventDefault();
});

Of course, in the function, you can check for empty fields, and if anything doesn't look right, e.preventDefault() will stop the submit.

Without jQuery:

var form = document.getElementById("myForm");
function handleForm(event) { event.preventDefault(); } 
form.addEventListener('submit', handleForm);

How to prevent page from reloading after form submit - JQuery

The <button> element, when placed in a form, will submit the form automatically unless otherwise specified. You can use the following 2 strategies:

1. Use <button type="button"> to override default submission behavior
2. Use event.preventDefault() in the onSubmit event to prevent form submission

Solution 1:

• Advantage: simple change to markup
• Disadvantage: subverts default form behavior, especially when JS is disabled. What if the user wants to hit "enter" to submit?

Insert extra type attribute to your button markup:

<button id="button" type="button" value="send" class="btn btn-primary">Submit</button>

Solution 2:

• Advantage: form will work even when JS is disabled, and respects standard form UI/UX such that at least one button is used for submission

Prevent default form submission when button is clicked. Note that this is not the ideal solution because you should be in fact listening to the submit event, not the button click event:

$(document).ready(function () {
  // Listen to click event on the submit button
  $('#button').click(function (e) {

    e.preventDefault();

    var name = $("#name").val();
    var email = $("#email").val();

    $.post("process.php", {
      name: name,
      email: email
    }).complete(function() {
        console.log("Success");
      });
  });
});

Better variant:

In this improvement, we listen to the submit event emitted from the <form> element:

$(document).ready(function () {
  // Listen to submit event on the <form> itself!
  $('#main').submit(function (e) {

    e.preventDefault();

    var name = $("#name").val();
    var email = $("#email").val();

    $.post("process.php", {
      name: name,
      email: email
    }).complete(function() {
        console.log("Success");
      });
  });
});

Even better variant: use .serialize() to serialize your form, but remember to add name attributes to your input:

The name attribute is required for .serialize() to work, as per jQuery's documentation:

For a form element's value to be included in the serialized string, the element must have a name attribute.

<input type="text" id="name" name="name" class="form-control mb-2 mr-sm-2 mb-sm-0" id="inlineFormInput" placeholder="Jane Doe">
<input type="text" id="email" name="email" class="form-control" id="inlineFormInputGroup" placeholder="janedoe@email.com">

And then in your JS:

$(document).ready(function () {
  // Listen to submit event on the <form> itself!
  $('#main').submit(function (e) {

    // Prevent form submission which refreshes page
    e.preventDefault();

    // Serialize data
    var formData = $(this).serialize();

    // Make AJAX request
    $.post("process.php", formData).complete(function() {
      console.log("Success");
    });
  });
});

How to prevent form to reload page after onsubmit

Prevent the default behavior of the submit using event.preventDefault. Then use ajax to submit the form value.

Also in addEventListener while attaching the event you dont need to immediately call the getGridValues, so avoid the () after the function name

function getGridValues(e) {  e.preventDefault();  const inputHeight = document.getElementById('inputHeight').value;  const inputWidth = document.getElementById('inputWidth').value;  console.log(`Height: ${inputHeight}, Width: ${inputWidth}`);
  // Here use ajax to submit the value}
document.getElementById('submit').addEventListener("click", getGridValues);

<form id="sizePicker">  Grid Height:  <input type="number" id="inputHeight" name="height" min="1" value="1"> Grid Width:  <input type="number" id="inputWidth" name="width" min="1" value="1">  <input type="submit" id="submit"></form>

afterSubmission(event) {
    event.preventDefault();
    let name = this.state.itemName;
    this.setState ({
        storedItemName:this.state.itemName
    }, function() {
        alert(this.state.storedItemName); // Shows the right value!
    }
}

newForm.addEventListener("submit", changeFinish);

newForm.addEventListener("submit", event => {
  event.preventDefault();
  changeFinish(event);
});

 <button  type ='button' id="encode">encode</button>